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Observe operation of timepiece parts and subassemblies to determine accuracy of movement, and to diagnose causes of defects.
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Clean and lubricate timepiece parts and assemblies, using solvents, buff sticks, and oil.
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Tighten or replace loose jewels, using watchmakers' tools.
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Adjust sizes or positioning of timepiece parts to achieve specified fit or function, using calipers, fixtures, and loupes.
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Assemble and install components of timepieces to complete mechanisms, using watchmakers' tools and loupes.
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Turn wheels of calipers and examine springs, using loupes, to determine if center coils appear as perfect circles.
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Examine components of timepieces such as watches, clocks, or chronometers for defects, using loupes or microscopes.
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Test operation and fit of timepiece parts and subassemblies, using electronic testing equipment, tweezers, watchmakers' tools, and loupes.
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Disassemble timepieces such as watches, clocks, and chronometers so that repairs can be made.
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Estimate spaces between collets and first inner coils to determine if spaces are within acceptable limits.
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Bend parts, such as hairsprings, pallets, barrel covers, and bridges, to correct deficiencies in truing or endshake, using tweezers.
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Examine and adjust hairspring assemblies to ensure horizontal and circular alignment of hairsprings, using calipers, loupes, and watchmakers' tools.
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Change timing weights on balance wheels to correct deficient timing.
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Mount hairsprings and balance wheel assemblies between jaws of truing calipers.
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Bend inner coils of springs away from or toward collets, using tweezers, to locate centers of collets in centers of springs, and to correct errors resulting from faulty colleting of coils.
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Review blueprints, sketches, or work orders to gather information about tasks to be completed.
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Replace specified parts to repair malfunctioning timepieces, using watchmakers' tools, loupes, and holding fixtures.